package com.jcdm.main.websocket;
|
|
|
import cn.hutool.log.Log;
|
import cn.hutool.log.LogFactory;
|
import com.alibaba.fastjson.JSON;
|
import com.alibaba.fastjson.JSONObject;
|
import org.springframework.stereotype.Component;
|
import org.springframework.stereotype.Service;
|
import org.springframework.util.StringUtils;
|
|
import javax.websocket.*;
|
import javax.websocket.server.PathParam;
|
import javax.websocket.server.ServerEndpoint;
|
import java.io.IOException;
|
import java.util.concurrent.ConcurrentHashMap;
|
|
|
|
@Component
|
@Service
|
@ServerEndpoint("/websocket/{userId}")
|
public class WebSocketServer {
|
static Log log = LogFactory.get(WebSocketServer.class);
|
/**
|
* 静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
|
*/
|
private static int onlineCount = 0;
|
/**
|
* concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
|
*/
|
private static ConcurrentHashMap<String, WebSocketServer> webSocketMap = new ConcurrentHashMap<>();
|
/**
|
* 与某个客户端的连接会话，需要通过它来给客户端发送数据
|
*/
|
private Session session;
|
/**
|
* 接收userId
|
*/
|
private String userId = "";
|
|
/**
|
* 连接建立成功调用的方法
|
*/
|
@OnOpen
|
public void onOpen(Session session, @PathParam("userId") String userId) {
|
this.session = session;
|
this.userId = userId;
|
if (webSocketMap.containsKey(userId)) {
|
webSocketMap.remove(userId);
|
webSocketMap.put(userId, this);
|
//加入set中
|
} else {
|
webSocketMap.put(userId, this);
|
//加入set中
|
addOnlineCount();
|
//在线数加1
|
}
|
|
log.info("用户连接:" + userId + ",当前在线人数为:" + getOnlineCount());
|
|
try {
|
sendMessage("连接成功");
|
} catch (IOException e) {
|
log.error("用户:" + userId + ",网络异常!!!!!!");
|
}
|
}
|
|
/**
|
* 连接关闭调用的方法
|
*/
|
@OnClose
|
public void onClose() {
|
if (webSocketMap.containsKey(userId)) {
|
webSocketMap.remove(userId);
|
//从set中删除
|
subOnlineCount();
|
}
|
log.info("用户退出:" + userId + ",当前在线人数为:" + getOnlineCount());
|
}
|
|
/**
|
* 收到客户端消息后调用的方法
|
*
|
* @param message 客户端发送过来的消息
|
*/
|
@OnMessage
|
public void onMessage(String message, Session session) {
|
log.info("用户消息:" + userId + ",报文:" + message);
|
//可以群发消息
|
//消息保存到数据库、redis
|
|
if (! StringUtils.isEmpty(message)) {
|
try {
|
//解析发送的报文
|
JSONObject jsonObject = JSON.parseObject(message);
|
|
} catch (Exception e) {
|
e.printStackTrace();
|
}
|
}
|
}
|
|
/**
|
* @param session
|
* @param error
|
*/
|
@OnError
|
public void onError(Session session, Throwable error) {
|
log.error("用户错误:" + this.userId + ",原因:" + error.getMessage());
|
error.printStackTrace();
|
}
|
|
/**
|
* 实现服务器主动推送
|
*/
|
public void sendMessage(String message) throws IOException {
|
this.session.getBasicRemote().sendText(message);
|
}
|
|
|
/**
|
* 实现服务器主动推送
|
*/
|
public static void sendAllMessage(String message) throws IOException {
|
log.info("发送消息:" + message);
|
ConcurrentHashMap.KeySetView<String, WebSocketServer> userIds = webSocketMap.keySet();
|
for (String userId : userIds) {
|
WebSocketServer webSocketServer = webSocketMap.get(userId);
|
webSocketServer.session.getBasicRemote().sendText(message);
|
System.out.println("webSocket实现服务器主动推送成功userIds====" + userIds);
|
}
|
}
|
|
/**
|
* 发送自定义消息
|
*/
|
public static void sendInfo(String message, @PathParam("userId") String userId) throws IOException {
|
log.info("发送消息到:" + userId + "，报文:" + message);
|
if (!StringUtils.isEmpty(message) && webSocketMap.containsKey(userId)) {
|
webSocketMap.get(userId).sendMessage(message);
|
} else {
|
log.error("用户" + userId + ",不在线！");
|
}
|
}
|
|
public static synchronized int getOnlineCount() {
|
return onlineCount;
|
}
|
|
public static synchronized void addOnlineCount() {
|
WebSocketServer.onlineCount++;
|
}
|
|
public static synchronized void subOnlineCount() {
|
WebSocketServer.onlineCount--;
|
}
|
}
|
